Electronic Auto rising/lowering CB antenna

Ok so it is a pain that i have to put my CB down everytime i enter the garage and up when i leave, so would it be possible to use the servo board that sproggy built to control the antenna with a servo? Anyone have any ideas?

Ok so i found an old DC motor i had in my garage, i tested it and it is really fast at 12v, and fast a 5v. I think it will be way to fast for my needs, is there any simple way to reduce the speed. I was thinking using gears, Little one on the moto, and a huge one on another axis. Is there an electrical way to pulsate the power to give a full voltage but in short bursts to slow it down?

Good motors to use for this would be wiper motors. They usually come aready geared, with internal switches that trip when the motor has reached one extreme of rotation. Should be fairly simple to build a relay based circuit to run it.